System management mode emulation of the real-time clock
US11994900B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2021 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | May 30, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An information handling system sets up at power-on self-test, a system management interrupt based on a trap on an input/output port used for a real-time clock and detects at runtime, an operation on the input/output port. In response to detecting the operation on the input/output port, generates the system management interrupt based on the trap on the input/output port. In addition, the information handling system handles the system management interrupt by emulating the real-time clock according to the operation on the input/output port that includes determining a register that is mapped to an index associated with the operation and accessing the register and executing a function associated with the register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.